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#1
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Hello all of you
I am in the process of completing the "power supply of my dream". One of the problem i meet is the meetering. I would like to use a digital voltmeter (those with red led). I alwready use the LCD volmeter but i dont like them. They are way too much sensitive to static, they dont really produce a bright display and they dont seem to like to have volt on their input when they are off. Does anyone could point me to some kit for that purpose. I have room on the face plate for two of them (5 cmx2cm) I am not sure the second one for amp would be usefull. Amp change very rapidly and maybe there is another way to measure them. 72/73 de Jean(VE2GHI) |
#2
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![]() "Jean" wrote in message ... Hello all of you I am in the process of completing the "power supply of my dream". One of the problem i meet is the meetering. I would like to use a digital voltmeter (those with red led). I alwready use the LCD volmeter but i dont like them. They are way too much sensitive to static, they dont really produce a bright display and they dont seem to like to have volt on their input when they are off. Does anyone could point me to some kit for that purpose. I have room on the face plate for two of them (5 cmx2cm) I am not sure the second one for amp would be usefull. Amp change very rapidly and maybe there is another way to measure them. 72/73 de Jean(VE2GHI) Marlin P Jones in N Palm FL has what you need. mpja.com (?) Dale W4OP |
#3
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On Feb 12, 7:19*pm, Jean wrote:
Hello all of you I am in the process of completing the "power supply of my dream". One of the problem i meet is the meetering. I would like to use a digital voltmeter (those with red led). I alwready use the LCD volmeter but i dont like them. They are way too much sensitive to static, they dont really produce a bright display and they dont seem to like to have volt on their input when they are off. LCD displays may be more viewable than LED in sunlight. LCD displays are available with backlights for use in dim environments. There are both LCD and LED panel meters available but they use very similar chipsets so I'm not sure "too much sensitive to static" would be true for one but not the other. Does anyone could point me to some kit for that purpose. I have room on the face plate for two of them (5 cmx2cm) Go to Digikey and search for "LED panel meter". I am not sure the second one for amp would be usefull. Amp change very rapidly and maybe there is another way to measure them. For rapidly varying quantities nothing beats a good old analog meter. For slowly changing quantities you need to know to 4 decimal places nothing beats a digital meter. Sometimes digital meters are supplemented with a bargraph type display to show rapid changes graphically. Tim N3QE |
#4
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On Feb 12, 7:19*pm, Jean wrote:
Hello all of you I am in the process of completing the "power supply of my dream". One of the problem i meet is the meetering. I would like to use a digital voltmeter (those with red led). I alwready use the LCD volmeter but i dont like them. They are way too much sensitive to static, Hey OM I don't think it's all about static per say. But the high input impedance you have to worry about I seen those things going up to 200 meg input, just looking at it would change the potential across a 200 meg input. There's other cons about LCD like if it gets cold forget it, those liquid crystals just don't want to do their thing, when exposed to the energizing electric field at low temps. Sure you can get back lite LCD's but what happens when the back lite burns out? I like LED displays but even then you are going to want to swamp down the meter input with like 1000 ohms. 73 OM de n8zu |
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